A dual modality optical fiber sensor

We propose and demonstrate a fibre optic system based on bi-tapered silica fibre that can simultaneously measure strain and fibre curvature. Both modalities on the signal can be extracted with no measurable crosstalk between them. The experimental signal has a pure phase modulation when strain is ap...

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Bibliographic Details
Published in:Journal of modern optics 2018-02, Vol.65 (3), p.342-347
Main Authors: Herrera-Piad, Luis A., Haus, Joseph W., Jauregui-Vazquez, Daniel, Lopez-Dieguez, Yanelis, Estudillo-Ayala, Julian M., Sierra-Hernandez, Juan M., Hernandez-Garcia, Juan C., Rojas-Laguna, Roberto
Format: Article
Language:English
Subjects:
Crosstalk
Curvature
Fiber optics
Fibre optic sensor
Phase modulation
Silica
Silicon dioxide
simultaneous independent measurement
strain
tapered optical fibre
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Summary:We propose and demonstrate a fibre optic system based on bi-tapered silica fibre that can simultaneously measure strain and fibre curvature. Both modalities on the signal can be extracted with no measurable crosstalk between them. The experimental signal has a pure phase modulation when strain is applied to the tapered fibre optic section of the sensor and the signal shows only intensity modulation when an un-tapered fibre section is bent. High sensitivity is achieved from the experimental results for strain and bending losses and the estimation of measurement errors is 0.2 and 0.1%, respectively. This system offers low-cost, compactness and it can be adapted for structural health monitoring.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2017.1397220